What is matter?
In which states can we find matter?
What is magnetism?
The ability of an object to attract metals.
What is the difference between soluble and insoluble?
A substance that dissolves well into another is soluble, if it doesn't is insoluble.
Why does a cruise ship float?
Because it has cameras of air inside.
What are the two fundamental properties of matter?
Volume and mass
Which unit do we use to measure density?
We use kg/l (kilograms per litre).
What are water's boiling and melting points?
Boiling point: 100ºC
Melting point: 0ºC
Define gravity.
A downward force that pushes the objects down.
What is the measuring unit of mass? And volume?
Volume: litres
Mass: grams
What is hardness?
The measure of how resistant an object is to scratching.
Give two examples of great heat conductors and two great heat insulators.
Conductors: copper, iron...
Insulators: wood, paper, plastic, glass, wool...
When does an object sink?
When its density is bigger than the density of the liquid it is in.
According to its composition, we can classify matter into...
How do we calculate density?
Density = mass / volume (mass divided into volume)
Give two examples of great electrical conductors and two great electrical insulators.
Conductors: graphite, copper, gold...
Insulators: glass, cotton, rubber...
When its density is less than the density of the liquid it is in.
What is the difference between heterogeneous mixtures and homogeneous mixtures?
In homogeneous mixtures you can´t distinguish between the components of the mixtures, but in heterogeneous you can see the different components.
Define elasticity.
Elasticity is the ability of a solid to return to its original shape after being deformed.
Define solubility.
The ability of a substance to dissolve in another substance.
Define buoyancy.
An upward force that pushes the object towards the surface of a liquid.